Question

\frac { 1 } { 4 } \cos ^ { 2 } \frac { \pi } { 6 } + \frac { 3 } { 4 } \sin ^ { 2 } \frac { \pi } { 6 } + \frac { 15 } { 8 } \tan ^ { 2 } \frac { \pi } { 6 } = 141​cos26π​+43​sin26π​+815​tan26π​=1​

Answer 1

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