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sin2A=2sinA is true when A= (a) 0^@ (...

`sin2A=2sinA` is true when `A=` `(a) 0^@` (b) `30^@` (c) `45^@` (d) `60^@`

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RD SHARMA ENGLISH-TRIGONOMETRIC RATIOS-All Questions
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  16. If A, B and C are interior angles of a triangle ABC, then show that "s...

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  19. In Fig. 5.47, the value of cosvarphi is (FIGURE) 5/4 (b) 5/3 (c) 3/...

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