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Question

Find the value of csc103sec10

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Solution

cosec103sec10=1sin103cos10
=cos103sin10sin10cos10=2[cos103sin102sin10cos10]
=4[12cos1032sin10sin20]=4[sin(3010)sin20]
=4sin20sin20=4

1198114_1297420_ans_eede7c3253fc44bfaec52b1b96199341.jpg

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