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Question

Find the value of 3sin114tan1(3)+5cos1(32)+cos11

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Solution

=3sin14tan1(3)+5cos.(32)+cos1(1)
=3×904×120+5×150+0
=270480+750(0θ180)
=540
tan(120) = tan (90+30)
= - cot 30
=3
cos(150) = cos (90+60)
= -sin 60
=32

1226810_1297846_ans_f21edefe9fc34a029a445480b9e06030.jpg

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