253.If x = y cos a. sin β, y = γ cos α.cos β, z = γ sin a. Show that x2 + y2 +z2 = γ2 = γ2.
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254.
If show that
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255.In the given Fig. ABCD is a rectangle with DC = 8 cm and BC = 6 cm. Line segment CM is drawn making an angle of 30° with DC, intersecting AD in M. Find the length of CM and DM.
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256.In the given Fig. ABCD is a rectangle in which segments AP and AQ are drawn as shown. Find the length of (AP + AQ).
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257.
If Determine
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258.
If Find the value of cos (θ + β), if θ and β are both acute angles.
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259.
If show that
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260.If x = a cos θ – b sin θ; y = a sin θ + b cos θ. Prove that x2+ y2 = a2 + b2
Short Answer Type
prove that 
show that 
Determine 
show that 
