Grade 11Trigonometry
1)If sinπ÷18sin5π÷18sin7π÷18=2) os56+cos58 − cos66−4cos28cos29sin33=
1)If sinπ÷18sin5π÷18sin7π÷18=
2) os56+cos58 − cos66−4cos28cos29sin33=
1 Answer
Vikas TU
Hiii Saisindhuja
Sin180 = 0
Sin 5*180 = 0
Sin 7*180 = 0
So, the 1 st ans will come as 0.
2). Put all values in the equation you will get the ans as : -1 .
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